Setup oh-my-zsh on remote server when supplied SSHFN

zsh-up.sh

#!/usr/bin/env bash

set -euo pipefail
export IFS=$'\n\t'

SSHFN=$@

ohmyzsh="curl -fsSL https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh -o \~/install.sh"


# replace "clark" with non-admin user
if [[ $SSHFN == *"clark"* ]]; then
    echo "Skipping package updates because clark..."
else
    set -x
    eval $SSHFN "sudo yum makecache fast" \
        || eval $SSHFN "sudo apt-get update"
    eval $SSHFN "sudo yum install -y git zsh vim tmux" \
        || eval $SSHFN "sudo apt-get install -y git zsh vim tmux"
    set +x
fi

set -x
eval $SSHFN $ohmyzsh
eval $SSHFN "zsh \~/install.sh"
eval $SSHFN "sed -i 's/robbyrussell/norm/g' \~/.zshrc"
set +x